MBMG-9271
Montana Bureau of Mines and Geology
Located in Gallatin County, Montana, this groundwater monitoring location is associated with a water well in the Northern Rocky Mountains Intermontane Basins aquifer systems.
Well Construction
| Depth | Description | |
|---|---|---|
| -2.0-209.0 ft | 6.0 in diameter steel casing | |
| 209.0-209.0 ft | 6.0 in diameter open bottom screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-21.0 ft | unknown | TOPSOIL |
| 21.0-30.0 ft | unknown | SANDSTONE |
| 30.0-68.0 ft | unknown | BENTONITE BEARING CLAY |
| 68.0-86.0 ft | unknown | SANDSTONE- GRAY |
| 86.0-90.0 ft | unknown | DARK BROWN SANDSTONE |
| 90.0-108.0 ft | unknown | BENTONITE BEARING CLAY |
| 108.0-145.0 ft | unknown | GREENISH CLAY |
| 145.0-162.0 ft | unknown | SANDSTONE |
| 162.0-174.0 ft | unknown | GREEN SAND |
| 174.0-195.0 ft | unknown | GREENISH CLAY |
| 195.0-220.0 ft | unknown | BLUE SHALE |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-9271 Site Number 9271 Site Type WELL Lat/Long (NAD83) 45.8089, -111.5662 Well Depth 220 Feet Elevation (NAVD88) 4413.406 ft Latitude 45.80891163 Longitude -111.5661704 Local Aquifer Name 120SDMS, SEDIMENTS (TERTIARY) (None) National Aquifer Name Northern Rocky Mountains Intermontane Basins aquifer systems (S100NRMTIB) Aquifer Type CONFINED Water-Level Well Type Trend Water-Level Well Characteristics Background Water Quality Network MONTANA GWIC Additional info Link 1 -
Activity Start Date Activity Start Time Characteristic Name Measure Value Units Detection Limit Value Type Sample Fraction Method Name Analytical Method System Sample Method ID Sample Method ID Context Sample Method Name Activity Type Code Data Provided By -
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How do we calculate statistics?
Overall Water Level Statistics (Depth to water, feet below land surface) Lowest Water Level Median Water Level Highest Water Level First Measurement Date Last Measurement Date Number of Measurements Years of Record Latest Value Latest Percentile 143.50 139.87 134.86 1992-11-20 2026-03-23 146 33.3 134.86 100.0 Statistics Calculated 2026-05-15 Monthly Water Level Statistics (Depth to water, feet below land surface) Month Lowest Median 10th Percentile 25th Percentile 50th Percentile 75th Percentile 90th Percentile Highest Median Number of Measurements Years of Record Jan 142.54 142.43 141.63 140.29 139.57 138.85 138.45 20 20 Mar 142.96 142.91 142.08 139.47 136.87 134.98 134.86 12 12 Apr 142.31 141.80 140.97 139.91 138.92 138.34 135.68 20 20 Jun 143.15 142.98 140.80 139.55 137.46 135.26 135.21 10 10 Jul 142.73 142.59 141.99 140.65 139.92 139.31 138.80 18 18 Oct 142.35 142.19 141.21 140.27 139.27 138.60 137.94 19 19 Dec 142.91 142.90 142.04 139.43 135.76 135.21 135.11 11 11 Statistics Calculated 2026-05-15 -
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